G. Strydom

Variations in selected water quality variables and metal concentrations in the sediment of the lower Olifants and Selati rivers, South Africa

A. Deacon, J. J. Vuren, T. Seymore, 1994 .

Plat sjambok anorthosite suite near Copperton, North-West Cape Province - South Africa

G. Strydom, D. Geringer, 1980 .